BETHESDA, Md. — Researchers hooked Zach Ault to medical displays as he slowly climbed onto a gymnasium bike. An invisible illness is sidelining this as soon as avid athlete and he knew the easy train would wipe him out — however Ault was pedaling for science. Chronic fatigue syndrome is certainly one of drugs’s most vexing mysteries. Now medical doctors on the National Institutes of Health are utilizing volunteers like Ault for a novel research that pushes their limits in the hunt for what’s stealing all their vitality. “I’ve tried to exercise my way out of this multiple times and I’ve put myself in deeper pits every time,” stated Ault, 36, of Paducah, Kentucky, as he